The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project
The Lagos coast has been suffering high rates of erosion since the construction of three harbour moles, i.e. the West Mole, East Mole and the Training Mole, at the tidal inlet connecting the Lagos Lagoon to the South Atlantic Ocean. To provide for a permanent erosion mitigation measure and to create...
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University of Twente
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fttudelft:oai:tudelft.nl:uuid:6ceb4ee8-1574-4efa-bf10-60abfae1f9cd 2023-07-30T04:06:50+02:00 The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project van Bentum, K.M. (author) Hoyng, C.W. (author) van Ledden, M. (author) Luijendijk, A.P. (author) Stive, M.J.F. (author) 2012-03-14 http://resolver.tudelft.nl/uuid:6ceb4ee8-1574-4efa-bf10-60abfae1f9cd en eng University of Twente Jubilee conference proceedings, NCK-days 2012 : Crossing borders in coastal research, Enschede, Nederland, 13-16 maart 2012--9789036533423 http://resolver.tudelft.nl/uuid:6ceb4ee8-1574-4efa-bf10-60abfae1f9cd (c) Delft University of Technology conference paper Text 2012 fttudelft 2023-07-08T20:08:05Z The Lagos coast has been suffering high rates of erosion since the construction of three harbour moles, i.e. the West Mole, East Mole and the Training Mole, at the tidal inlet connecting the Lagos Lagoon to the South Atlantic Ocean. To provide for a permanent erosion mitigation measure and to create residential and commercial area for circa 400,000 people, the Eko Atlantic City project has been initiated in 2008. In front of the eroded coast, approximately 9 km² of land will be reclaimed and protected by a revetment. In this study the long-term and large-scale morphological behavior of the Lagos coast is investigated and subsequently the long-term morphological impact of the project is assessed. First, a conceptual model is created, in which the historical development of the coast is discussed. The long-term morphological behavior of the coast downstream of the inlet is determined by two main factors: sediment accumulation at the West Mole and sediment import into the tidal inlet and the lagoon, induced by disturbance of the morphological equilibrium by sea level rise and dredging activities. Using the numerical simulation model Unibest, the long-term impact of Eko Atlantic City is assessed. It is concluded that the construction of Eko Atlantic City will not change the total erosion volumes downstream of the inlet. However, as the revetment of the project retains the coast, the erosion will be shifted towards downstream. Downdrift of the project, the erosion rates are locally relatively high. The shape of the sea defence has been designed to minimize the local erosion effect. A monitoring and mitigation strategy has been recommended to monitor this effect and instruct coastal protection management actions to be implemented if required. Water Management Civil Engineering and Geosciences Conference Object South Atlantic Ocean Delft University of Technology: Institutional Repository |
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Delft University of Technology: Institutional Repository |
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fttudelft |
language |
English |
description |
The Lagos coast has been suffering high rates of erosion since the construction of three harbour moles, i.e. the West Mole, East Mole and the Training Mole, at the tidal inlet connecting the Lagos Lagoon to the South Atlantic Ocean. To provide for a permanent erosion mitigation measure and to create residential and commercial area for circa 400,000 people, the Eko Atlantic City project has been initiated in 2008. In front of the eroded coast, approximately 9 km² of land will be reclaimed and protected by a revetment. In this study the long-term and large-scale morphological behavior of the Lagos coast is investigated and subsequently the long-term morphological impact of the project is assessed. First, a conceptual model is created, in which the historical development of the coast is discussed. The long-term morphological behavior of the coast downstream of the inlet is determined by two main factors: sediment accumulation at the West Mole and sediment import into the tidal inlet and the lagoon, induced by disturbance of the morphological equilibrium by sea level rise and dredging activities. Using the numerical simulation model Unibest, the long-term impact of Eko Atlantic City is assessed. It is concluded that the construction of Eko Atlantic City will not change the total erosion volumes downstream of the inlet. However, as the revetment of the project retains the coast, the erosion will be shifted towards downstream. Downdrift of the project, the erosion rates are locally relatively high. The shape of the sea defence has been designed to minimize the local erosion effect. A monitoring and mitigation strategy has been recommended to monitor this effect and instruct coastal protection management actions to be implemented if required. Water Management Civil Engineering and Geosciences |
format |
Conference Object |
author |
van Bentum, K.M. (author) Hoyng, C.W. (author) van Ledden, M. (author) Luijendijk, A.P. (author) Stive, M.J.F. (author) |
spellingShingle |
van Bentum, K.M. (author) Hoyng, C.W. (author) van Ledden, M. (author) Luijendijk, A.P. (author) Stive, M.J.F. (author) The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
author_facet |
van Bentum, K.M. (author) Hoyng, C.W. (author) van Ledden, M. (author) Luijendijk, A.P. (author) Stive, M.J.F. (author) |
author_sort |
van Bentum, K.M. (author) |
title |
The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
title_short |
The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
title_full |
The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
title_fullStr |
The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
title_full_unstemmed |
The Lagos coast: Investigation of the long-term morphological impact of the Eko Atlantic City project |
title_sort |
lagos coast: investigation of the long-term morphological impact of the eko atlantic city project |
publisher |
University of Twente |
publishDate |
2012 |
url |
http://resolver.tudelft.nl/uuid:6ceb4ee8-1574-4efa-bf10-60abfae1f9cd |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
Jubilee conference proceedings, NCK-days 2012 : Crossing borders in coastal research, Enschede, Nederland, 13-16 maart 2012--9789036533423 http://resolver.tudelft.nl/uuid:6ceb4ee8-1574-4efa-bf10-60abfae1f9cd |
op_rights |
(c) Delft University of Technology |
_version_ |
1772819778485878784 |